| Message ID | 20211225193556.66804-1-david@ixit.cz (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] dt-bindings: iommu: Convert msm,iommu-v0 to yaml | expand |
On Sat, Dec 25, 2021 at 08:35:55PM +0100, David Heidelberg wrote: > Convert Qualcomm IOMMU v0 implementation to yaml format. > > Signed-off-by: David Heidelberg <david@ixit.cz> > --- > v2: > - fix wrong path in binding $id > - comment qcom,mdp4 node example (we don't want to validate it yet) > > .../bindings/iommu/msm,iommu-v0.txt | 64 ------------- > .../bindings/iommu/qcom,iommu-v0.yaml | 96 +++++++++++++++++++ qcom,apq8064-iommu.yaml At this point, I don't think we'll get a 2nd user. > 2 files changed, 96 insertions(+), 64 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt > create mode 100644 Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml > > diff --git a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt b/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt > deleted file mode 100644 > index 20236385f26e..000000000000 > --- a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt > +++ /dev/null > @@ -1,64 +0,0 @@ > -* QCOM IOMMU > - > -The MSM IOMMU is an implementation compatible with the ARM VMSA short > -descriptor page tables. It provides address translation for bus masters outside > -of the CPU, each connected to the IOMMU through a port called micro-TLB. > - > -Required Properties: > - > - - compatible: Must contain "qcom,apq8064-iommu". > - - reg: Base address and size of the IOMMU registers. > - - interrupts: Specifiers for the MMU fault interrupts. For instances that > - support secure mode two interrupts must be specified, for non-secure and > - secure mode, in that order. For instances that don't support secure mode a > - single interrupt must be specified. > - - #iommu-cells: The number of cells needed to specify the stream id. This > - is always 1. > - - qcom,ncb: The total number of context banks in the IOMMU. > - - clocks : List of clocks to be used during SMMU register access. See > - Documentation/devicetree/bindings/clock/clock-bindings.txt > - for information about the format. For each clock specified > - here, there must be a corresponding entry in clock-names > - (see below). > - > - - clock-names : List of clock names corresponding to the clocks specified in > - the "clocks" property (above). > - Should be "smmu_pclk" for specifying the interface clock > - required for iommu's register accesses. > - Should be "smmu_clk" for specifying the functional clock > - required by iommu for bus accesses. > - > -Each bus master connected to an IOMMU must reference the IOMMU in its device > -node with the following property: > - > - - iommus: A reference to the IOMMU in multiple cells. The first cell is a > - phandle to the IOMMU and the second cell is the stream id. > - A single master device can be connected to more than one iommu > - and multiple contexts in each of the iommu. So multiple entries > - are required to list all the iommus and the stream ids that the > - master is connected to. > - > -Example: mdp iommu and its bus master > - > - mdp_port0: iommu@7500000 { > - compatible = "qcom,apq8064-iommu"; > - #iommu-cells = <1>; > - clock-names = > - "smmu_pclk", > - "smmu_clk"; > - clocks = > - <&mmcc SMMU_AHB_CLK>, > - <&mmcc MDP_AXI_CLK>; > - reg = <0x07500000 0x100000>; > - interrupts = > - <GIC_SPI 63 0>, > - <GIC_SPI 64 0>; > - qcom,ncb = <2>; > - }; > - > - mdp: qcom,mdp@5100000 { > - compatible = "qcom,mdp"; > - ... > - iommus = <&mdp_port0 0 > - &mdp_port0 2>; > - }; > diff --git a/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml > new file mode 100644 > index 000000000000..6f166c30b9ec > --- /dev/null > +++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml > @@ -0,0 +1,96 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > + > +$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#" > +$schema: "http://devicetree.org/meta-schemas/core.yaml#" > + > +title: Qualcomm IOMMU for APQ8064 > + > +maintainers: > + - Will Deacon <will@kernel.org> > + > +description: > > + The MSM IOMMU is an implementation compatible with the ARM VMSA short > + descriptor page tables. It provides address translation for bus masters > + outside of the CPU, each connected to the IOMMU through a port called micro-TLB. > + > +properties: > + compatible: > + const: qcom,apq8064-iommu > + > + clocks: > + items: > + - description: interface clock for register accesses > + - description: functional clock for bus accesses > + > + clock-names: > + oneOf: > + - items: > + - const: smmu_pclk > + - const: smmu_clk > + - items: > + - const: smmu_pclk > + - const: iommu_clk Where did this come from? It wasn't documented before. > + reg: > + maxItems: 1 > + > + interrupts: > + description: > > + Specifiers for the MMU fault interrupts. For instances that > + support secure mode two interrupts must be specified, for non-secure and > + secure mode, in that order. For instances that don't support secure mode a > + single interrupt must be specified. minItems: 1 items: - description: non-secure irq... - description: ... > + > + "#iommu-cells": > + const: 1 > + > + qcom,ncb: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: The total number of context banks in the IOMMU. > + > +# Each bus master connected to an IOMMU must reference the IOMMU > +# in its device node with the following property: What property? No need to describe how the iommu binding works. > +# A reference to the IOMMU in multiple cells. The first cell is a > +# phandle to the IOMMU and the second cell is the stream id. > +# A single master device can be connected to more than one iommu > +# and multiple contexts in each of the iommu. So multiple entries > +# are required to list all the iommus and the stream ids that the > +# master is connected to. Put the cells description under #iommu-cells. > + > +required: > + - clocks > + - clock-names > + - reg > + - interrupts > + - qcom,ncb > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/clock/qcom,mmcc-msm8960.h> > + > + mdp_port0: iommu@7500000 { > + compatible = "qcom,apq8064-iommu"; > + #iommu-cells = <1>; > + clock-names = > + "smmu_pclk", > + "smmu_clk"; > + clocks = > + <&clk SMMU_AHB_CLK>, > + <&clk MDP_AXI_CLK>; > + reg = <0x07500000 0x100000>; > + interrupts = > + <0 63 0>, > + <0 64 0>; > + qcom,ncb = <2>; > + }; > + > + /* mdp: mdp@5100000 { > + compatible = "qcom,mdp4"; > + ... > + > + iommus = <&mdp_port0 0 > + &mdp_port0 2>; > + };*/ > -- > 2.34.1 > >
diff --git a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt b/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt deleted file mode 100644 index 20236385f26e..000000000000 --- a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt +++ /dev/null @@ -1,64 +0,0 @@ -* QCOM IOMMU - -The MSM IOMMU is an implementation compatible with the ARM VMSA short -descriptor page tables. It provides address translation for bus masters outside -of the CPU, each connected to the IOMMU through a port called micro-TLB. - -Required Properties: - - - compatible: Must contain "qcom,apq8064-iommu". - - reg: Base address and size of the IOMMU registers. - - interrupts: Specifiers for the MMU fault interrupts. For instances that - support secure mode two interrupts must be specified, for non-secure and - secure mode, in that order. For instances that don't support secure mode a - single interrupt must be specified. - - #iommu-cells: The number of cells needed to specify the stream id. This - is always 1. - - qcom,ncb: The total number of context banks in the IOMMU. - - clocks : List of clocks to be used during SMMU register access. See - Documentation/devicetree/bindings/clock/clock-bindings.txt - for information about the format. For each clock specified - here, there must be a corresponding entry in clock-names - (see below). - - - clock-names : List of clock names corresponding to the clocks specified in - the "clocks" property (above). - Should be "smmu_pclk" for specifying the interface clock - required for iommu's register accesses. - Should be "smmu_clk" for specifying the functional clock - required by iommu for bus accesses. - -Each bus master connected to an IOMMU must reference the IOMMU in its device -node with the following property: - - - iommus: A reference to the IOMMU in multiple cells. The first cell is a - phandle to the IOMMU and the second cell is the stream id. - A single master device can be connected to more than one iommu - and multiple contexts in each of the iommu. So multiple entries - are required to list all the iommus and the stream ids that the - master is connected to. - -Example: mdp iommu and its bus master - - mdp_port0: iommu@7500000 { - compatible = "qcom,apq8064-iommu"; - #iommu-cells = <1>; - clock-names = - "smmu_pclk", - "smmu_clk"; - clocks = - <&mmcc SMMU_AHB_CLK>, - <&mmcc MDP_AXI_CLK>; - reg = <0x07500000 0x100000>; - interrupts = - <GIC_SPI 63 0>, - <GIC_SPI 64 0>; - qcom,ncb = <2>; - }; - - mdp: qcom,mdp@5100000 { - compatible = "qcom,mdp"; - ... - iommus = <&mdp_port0 0 - &mdp_port0 2>; - }; diff --git a/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml new file mode 100644 index 000000000000..6f166c30b9ec --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Qualcomm IOMMU for APQ8064 + +maintainers: + - Will Deacon <will@kernel.org> + +description: > + The MSM IOMMU is an implementation compatible with the ARM VMSA short + descriptor page tables. It provides address translation for bus masters + outside of the CPU, each connected to the IOMMU through a port called micro-TLB. + +properties: + compatible: + const: qcom,apq8064-iommu + + clocks: + items: + - description: interface clock for register accesses + - description: functional clock for bus accesses + + clock-names: + oneOf: + - items: + - const: smmu_pclk + - const: smmu_clk + - items: + - const: smmu_pclk + - const: iommu_clk + reg: + maxItems: 1 + + interrupts: + description: > + Specifiers for the MMU fault interrupts. For instances that + support secure mode two interrupts must be specified, for non-secure and + secure mode, in that order. For instances that don't support secure mode a + single interrupt must be specified. + + "#iommu-cells": + const: 1 + + qcom,ncb: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The total number of context banks in the IOMMU. + +# Each bus master connected to an IOMMU must reference the IOMMU +# in its device node with the following property: +# A reference to the IOMMU in multiple cells. The first cell is a +# phandle to the IOMMU and the second cell is the stream id. +# A single master device can be connected to more than one iommu +# and multiple contexts in each of the iommu. So multiple entries +# are required to list all the iommus and the stream ids that the +# master is connected to. + +required: + - clocks + - clock-names + - reg + - interrupts + - qcom,ncb + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/qcom,mmcc-msm8960.h> + + mdp_port0: iommu@7500000 { + compatible = "qcom,apq8064-iommu"; + #iommu-cells = <1>; + clock-names = + "smmu_pclk", + "smmu_clk"; + clocks = + <&clk SMMU_AHB_CLK>, + <&clk MDP_AXI_CLK>; + reg = <0x07500000 0x100000>; + interrupts = + <0 63 0>, + <0 64 0>; + qcom,ncb = <2>; + }; + + /* mdp: mdp@5100000 { + compatible = "qcom,mdp4"; + ... + + iommus = <&mdp_port0 0 + &mdp_port0 2>; + };*/
Convert Qualcomm IOMMU v0 implementation to yaml format. Signed-off-by: David Heidelberg <david@ixit.cz> --- v2: - fix wrong path in binding $id - comment qcom,mdp4 node example (we don't want to validate it yet) .../bindings/iommu/msm,iommu-v0.txt | 64 ------------- .../bindings/iommu/qcom,iommu-v0.yaml | 96 +++++++++++++++++++ 2 files changed, 96 insertions(+), 64 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt create mode 100644 Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml